Automatic single-trigger mechanism for double-barel guns



A ri 7 i927.

p w J. KAUTZKY, JR

AUTOMATIC SINGLE TRIGGER MECHANISM FOR DOUBLE BARREL GUNS Filed July 1. 192a J01: JL'AUTZKY, Jr.

Patented Apr. 19, 1927.

JOE KAUTZKY, JR., OF FORT DODGE, IOWA.

AUTOMATIC SINGLE-TRIGGER MECHANISM FOR DOUBLE-BARREL GUNS.

Application filed July 17,

The object of this invention is to provide an improved automatic mechanism for operating the single trigger of a double-barrel gun whereby when the trigger is pulled to discharge either barrel, the mechanism will act automatically to position the parts relative tothe trigger for the discharge of the other barrel when the trigger is again pulled.

More specifically, an object is to provide improved selective mechanism whereby either of the two barrels of a gun may be fired first by operation of a single trigger.

Still another object of the invention is to provide improved means for preventing immediate discharge'of the second barrel after the discharge of the first barrel of a doublebarrel gun through the rebound from the shoulder of the operator.

With these and other objects in view, my invention consists in the construction, arrangement and combination of elements hereinafter set forth, pointed out in the claims and illustrated by the accompanying drawing, in which- Figure 1 is a longitudinal section of a gun lock constructed according to my improvement, showing the parts in cocked position.

Figure 2 is a longitudinal section looking in the opposite direction from Figure l and showing the left hand hammer down as after discharge of the left barrel of the gun.

Figure 3 is a horizontal section onthe line 3-3 of Figure 2, showing the parts in readiness for the discharge of the right barrel. This view is on an enlarged scale.

Figure 4 is a cross-section on the line 4E- l of Figure 2, on an enlarged scale.

Figure 5 a detail longitudinal section on the line 5-5 of Figure 3, dotted lines indicating the safety block in locking position relative to the trigger.

Figure 6 is a bottom view of a portion'of the device, illustrating particularly the selecting slide.

2 I have employed the numeral 10 to designate generally the frame of the gun lock, which frame is adapted to carry two barrels (not shown) at its forward portion. Attached to the frame 10, and extending rearwardiy from its lower portion, is a trigger plate 11 which carries the major portion of my mechanism. Hammers 12 and 13 are pivoted in the frame at 14 in a common.

manner, and sears 15 and 16 are arranged below said hammers and pivoted between 1926. Serial No. 123,207.

their ends in the frame at 17. The forward ends of the sears 15 and 16 are adapted to engage in sear notches 18in the lower rear portions of the respective hammers to hold said hammers in cocked position, and springs 19 carried by the frame engage said scars and tend to hold them in such retaining position. A standard 20 isformed on and rises from the trigger plate 11 between the rear portions of the sears, and said standard is formed with two recesses, 21 and 22, arranged parallel and extending longitudinally therethrough. A trigger 23 is mounted in a slot 24 in the trigger plate and has its forward end extending within the recess 21 and pivoted to the standard 20 by a pin 25, and said trigger is provided with the usual trigger spring 26 within said recess, and attached to the trigger plate. The sears 15 and 16 are provided at their rear ends with right-angled inwardly projecting arms 27 and 28 which are arranged directly opposite each other at the rear of the standard 20. A sear-lifting plate 29 is horizontally arranged at the rear of the standard 20 and is formed with a narrow tongue 29 at its front end extending within the slot or recess 22and pivoted on the pin 25. The plate 29. is adapted to be engaged and lifted by a projection or lug 30 on the trigger whensaid trigger is pulled. A spring 31 is attached at one end to the trigger plate and engages the rear end of the sear-lifting plate 29, tending to hold it down andto return it to lowered position after the trigger is released, and likewise exerting a downward pressure on the trigger after such release. A sear lifter 32 is mounted on the sear-lifting plate and pivoted on a rertical pin 33 near its center. At its rear side the sear lifter is formed with outwardly and rearwardly extending wings 3e and 35 adapted to be engaged selectivelybeneath the respective arms 27 and 28 of the sears to operate said sears when the sear-lifting plate is lifted by pulling the trigger. At its forward side the sear lifter 32 is formed with slightly spaced, upstanding lugs 36 and 37. rear face of the standard 20 and is pivoted thereto by a pin 39 at its top. At its lower end the tumbler 38 is formed with a rearwardly projecting lug 4O extending between the upstanding lugs 36 and 37 of the sear lifter. The tumbler 38 is adapted to be oscillated on its pivot to oscillate the sear A tumbler 38 is mounted a ainst the lifter on its pivot so that oneior the other of the wings 34 and 35 will bemoved to engagement beneath an arm of the corresponding sear. Just forwardlyiofithelr rear ends the scars and 16 are formed with upstanding inwardly directed hooks 4L and respectively, which hooks overlie opposite sides of the tumbler 38 as clearly shown in .selected order of firing. on the rear'face of the standard serve Figure 4. Nvhen one ofthe barrels has been fired and the trigger is released,downward movement of the rear end of the sear under either direction by engagement withits upthe influence of its sear spring causes its hook 41 or 42 as the case may be to press downwardly on one side of the tumbler and oscillate it on its pivot 39, thus moving the sear lifter 32. through interengagementof the lug 4O betweenilugs ,36 and '37,. so that said sear lifter engages by one of its Wings beneath the other of the sears, in readiness for firing the second barrel.

The selective mechanism, to determine which of the barrels, right or left, willbe fired'first, consists of a leaf spring 43fixed at its rear end to a standard44 carried by the rear portion of the trigger plate 11, by means of ascrew I The spring 43 has its forward endengaging in an aperture 46 formed in the tumbler 38 to the right of its pivot 39 and normally exerting a downward pressure on the right hand side.

of said tumbler. This spring pressure causes the sear lifter32 to be-oscillated to' the left, through engagement of the lug. 4O

firing of the left barrel of the gun'first, as

the sear lifter is thus engaged beneath the arm :27 of the leftsear 15. 'Between its ends the spring 43 is formed with a downward hump or bend 46 (Figure 1) adapted to be engaged by a cam 47 on a slide piece 48. The slide 48 is arranged for reciprocation in a slot 49 in the trigger plate andhas a part extending below said plate and formed with a roughened thumb piece50 for its manualoperation. A screw 51, entering a slot 52 in the slide, serves to guide the forward end of said slide. When ,the slide 48 is moved forwardly by manual pressure. its cam 47 engages the bend 46 in the spring and pressesupwardly thereon, causing the spring to exert an upward instead of a downward pressure on the tumbler, thus reversing the firing order and causing the right hand barrel to be fired first. Indicia, such as the letters L and R preferably are placed on the lower side of the trigger plate as Sl10VI1V1I1'F1gllIe 6, one of which 7 V is covered in each position of thethumb piece 50, the exposed letter indicating which barrel, left or right, will be fired firstunder existing conditions.

In either position of the selective mechanism, the 110011.41 or 42 of thesear corresponding to the barel which is first fired,

ment to discharge the gun.

.will operate to oscillate the tumbler 38 against the action of the spring 43 to place the parts in position for firing the second barrel when the; trigger is released and pulled a second time; and when the mechlanism is again cockediandthesear hooks thus raised, the spring will act to place the tumbler and sear lifter in position for the Stop; and 54 to limit oscillation of the tumbler 38 in per face on opposite sides of the pivot 39. I have also provided means to prevent the trigger tobe forced against the finger.

FF or this purpose a block 55 is pivoted by a pm 56 on a standard 57 formed on and risingfrom the trigger plate at the rear of the slot 24. The block 55 is relatively heavy above its pivot and is formed with anarrow arm 55 extendingdownwardly through the trigger slot 24 and adapted to engage at times a seat 23 formed on the upper rear corner of'the trigger, to prevent raising of the trigger and discharge of the gun.

Normally the stop block 55 is held in inoperative positionby a coil spring 58 (Figure5) engaging the standard 57 and pressing the upper part of the block forwardly; but a sudden and forcible forward movement of the gun, as in rebounding from an operators shoulder after firing, causes the heavy block 55 to lag, compressing the spring 58, so that the arm 55 engages the seat of the trigger 23 and prevents a move- As soon as pressure on the trigger is released the spring 58 acts to return the stop or safety block to its normal position out of engagement with the trigger.

' I claim as my invention- 1. In a gun look, a frame, a trigger standard thereon, a trigger pivoted to said standard, a scar pivotally arranged on each side of said standardand having an inwardly directed arm at its rear end, a sear-lifting plate pivotally mounted and adapted to be raised by operation of said trigger,,a sear lifter pivoted on said plate and adapted for selective engagement beneath the arms of .said sears, a tumbler pivoted on said standard and adapted to oscillate said sear lifter, and means on said stars for oscillating said tumbler.

2.111 a gun lock, :1. frame, a pair of spring-pressed hammer-retaining sears pivotally mounted thereon, a trigger standard between said sears, a trigger pivoted to said standard, a sear-lifting plate pivoted to said standard and adapted to be raised by operation of said trigger, a spring exerting a downward pressure on said plate, a sear iii! lifter pivoted on said plate and adapted for selective engagement beneath said sears, a tumbler pivoted on said standard and adapted to oscillate said sear lifter, a tension means adapted for selective positioning to cause said tumbler to move to one side or the other, and means connected with said sea-rs to cause said tumbler to move to the opposite side after one of the sears has been operated.

3.111 a gun lock, a frame, a pair of spring-pressed hammer-retaining sears pivotally mounted thereon, a trigger standard on said frame between the sears, a trigger pivoted to said standard, a -sear-lifting plate pivoted to said standard and adapted to be raised by operation of said trigger, a scar lifter pivoted on said plate and adapted for selective engagement beneath said sears, a tumbler pivoted on said standard and adapted to oscillate said sear lifter, a tension means engaging said tumbler and adapted for selectively moving it in opposite directions to operate a selected sear upon the first operation of the trigger, and means connected with said sears for moving said tumbler against the action of said tension means after the first operation of the trigger, to position the parts for operation of the other sear upon a second operation of the trigger.

a, In a gun look, a frame, a pair of springpressed hammer-retaining sears pivotally mounted thereon, a trigger standard on said frame between said sears, a trigger pivoted on said standard, a sear-lifting plate pivoted to said standard and adapted to be raised by operation of the said trigger, a sear lifter pivoted on a vertical axis to said plate and adapted for selective engagement beneath said sears, a tumbler pivoted on a horizontal axis to said standard and having a rearwardly projecting lug, spaced lugs on said sear lifter on opposite sides of the tumbler lug whereby said sear lifter is oscillated through an oscillation of said tumbler, a tension means adapted for selective positioning to cause said tumbler to move to one side or the other, and means connected with said sears to cause said tumbler to move to the opposite side after one of the sears has been operated.

5. In a gun look, a. frame, a pair of springpressed hammer-retaining sears pivotally mounted thereon, a trigger pivoted on said standard, a sear-lifting plate pivoted to said standard and adapted to be raised by operation of said trigger, a sear lifter pivoted on a vertical axis on said plate and adapted for selective engagement beneath said sears, a pair of spaced lugs on the forward end of said sear lifter, a tumbler pivoted on a horizontal axis on the rear face of. said standard and having a part to engage between said lugs whereby said sear lifter is oscillated through oscillation of said tumbler, a spring engaging said tumbler, manually operated means for determining the direction of the pressure of said spring relative to said tumbler, and means connected with said sears for moving said tumbler in opposition to the pressure of said spring.

6. In a gun look, a frame, a pair of springpressed hammer-retaining sears pivotally mounted thereon, a trigger standard on said frame between the scars, a trigger pivoted to said standard, a searlifting plate pivoted to said standard and adapted to be raised by operation of said trigger, a sear lifter pivoted on a vertical axisto said plate'and adapted for selective engagement beneath said sears, a tumbler pivoted on a horizontal axis to the rear face of said standard and adapted to oscillate said sear lifter, a spring engaging said tumbler and normally tending to oscillate it in one direction, and a manually operated slide device adapted to engage said spring and cause it to exert an opposite pressure on said tumbler.

7. In a gun lock, a frame, a pair of springpressed hannner-retaining sears pivotally mounted thereon, a trigger standard on said frame between the sears, a trigger pivoted to said standard, a sear-lifting plate pivoted to said standard and adapted to be raised by operation of said trigger, a sear lifter pivoted on a vertical axis to said plate and adapted for selective engagement beneath said sears, a tumbler pivoted on a horizontal axis to said standard and adapted to oscillate said sear lifter,'a spring engaging said tumbler and normally tending to oscillate it in one direction, manually operated means for engaging said spring to cause it to exert an opposite pressure on said tumbler, and hooks on said sears adapted to engage said tumbler and oscillate it against the spring pressure in either direction.

8. In a gun lock, a frame, a pair of springpressed hammer-retaining sears pivotally mounted thereon, a trigger standard on said frame between thesears, a trigger pivoted to said standard, a sear-lifting plate pivoted to said standard and adapted to be raised by operation of said trigger, a sear lifter pivoted on a vertical axis to said plate and adapted for selective engagement be neath said sears, a tumbler pivoted on a horizontal axis to said standard and adapted to oscillate said sear lifter, a leaf spring fixed at one end and engaging said tumbler and normally tending to oscillate it in one direction, said spring being formed with a clownwardly projecting bend between its ends, and a manually operated slide device mounted in said frame and formed with a cam to engage said bend at times and cause the spring to exert an opposite force on said tumbler.

9. In a gun lock having a plurality of firing means and a single pivoted trigger for safety device comprising a block pivotally mounted and having a part adapted'to engage said trigger at tnnesto prevent ts operation, and a spring device tending to hold 3 adapted to engage the tr gger at times and said block out of engagement with said trigger but designed to be compressed by a forcihle forward movement of the mechanism to cause engagement Withsaid trigger.

10. In a gun lock having a frame a plurality of firing means and a trigger pivotally vmounted in the frame for successively operating said firing; means, a safety device comprising a block pivotally mounted in the frame and having a relatively heavy up per endportion, the lower end of said block prevent its operation, and a spring device tending to hold said block out of engagement wlth the trlgger.

JOE KAUTZKY, Jn. 

